Question 1

Which of the following is NOT a primary function of the lymphatic system?

Accepted Answer

Production of red blood cells

Question 2

When excess interstitial fluid enters lymphatic vessels, what is it called?

Accepted Answer

Lymph

Question 3

Which lymphatic vessel is responsible for absorbing dietary fats in the small intestine?

Accepted Answer

Lacteal

Question 4

Which lymphatic trunk drains fat-containing lymph from the small intestine into the cisterna chyli?

Accepted Answer

Intestinal trunk

Question 5

The right lymphatic duct drains lymph from which of the following regions?

Accepted Answer

Right side of the head, neck, thoracic cavity, and right arm

Question 6

Which structural feature of lymphatic vessels prevents the backflow of lymph?

Accepted Answer

Lymphatic valves

Question 7

A patient presents with severe swelling in one limb after lymphatic vessel removal during cancer surgery. What is the most likely diagnosis?

Accepted Answer

Lymphedema

Question 8

Which of the following best describes the flow of lymph through a lymph node?

Accepted Answer

Afferent lymphatic vessels → capsular sinus → cortical sinuses → medullary sinuses → efferent lymphatic vessels

Question 9

Which lymphoid organ is the largest in the body and is responsible for filtering pathogens from the blood?

Accepted Answer

Spleen

Question 10

Which region of the spleen contains macrophages that destroy old erythrocytes and stores iron and platelets?

Accepted Answer

Red pulp

Question 11

Which lymphoid organ is most active in infants and children, secretes thymosin, and is required for T cell maturation?

Accepted Answer

Thymus

Question 12

Which of the following is a secondary lymphoid organ where most immune responses occur?

Accepted Answer

Lymph node

Question 13

Which of the following is TRUE regarding mucosa-associated lymphatic tissue (MALT)?

Accepted Answer

It consists primarily of B and T cells and protects mucous membranes

Question 14

Which tonsil is also known as the adenoid?

Accepted Answer

Pharyngeal tonsil

Question 15

Which lymphoid structure is located in the ileum and defends against bacteria from the large intestine?

Accepted Answer

Peyer's patches

Question 16

Which of the following is a correct statement about lymph nodes?

Accepted Answer

They trap about 90% of pathogens in lymph

Question 17

Which of the following lymph node regions is found in the armpit and is commonly involved in breast cancer metastasis?

Accepted Answer

Axillary lymph nodes

Question 18

Which of the following best describes the role of reticular fibers in lymphoid tissue?

Accepted Answer

They provide structural support and trap pathogens

Question 19

Which of the following equations best represents the relationship between interstitial fluid volume ($V_{IF}$), lymphatic uptake ($U_L$), and cardiovascular return ($R_{CV}$) in a healthy individual?

Accepted Answer

$V_{IF} = 0$ when $U_L = R_{CV}$

Chapter 20: The Lymphatic System and Immunity – Overview and Functions

Study Guide - Practice Questions

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